sodeesteom



(No Model.)

A. SODERSTRM.

RATGHBT DRILL.

A No 288,882. Patented Nov. 20, 1888.

NIPETZRS. Fpnmwmgnmr. washington D. C

UNTTEE STATES PATENT @Erica ALBERT soDEnsfrEM, or STOCKHOLM, sWEDEN.

RATCHET-DRI LL.

SPECIFICATION forming part of Letters Patent No. 288,882, dated November 20, 1883,

n Application filedMarch 7,1893. (No model.)

To LZ whom it may concern:

Beit known that I, ALBERT SnEnsrRi/r, a citizen of Sweden, and a resident of the city of Stockholm, in the Kingdom of Sweden, have invented a new and useful Improvement in Ratchet-Drills, &c.,of which the following is a specification.

In ratchet-drills as generally constructed the lever or bar to Which the ratchet-pawl is attached is osoillated in a plane at right angles to the drill, and the palm of the hand of the operator holding the ratchet-lever lies parallel with the plane in which the lever moves, thus compelling the operator, during the circular movement of the bar, to constantly oscillate his hand in an awkward direction to the Wristjoint thereof, necessitating shorter strokes in the movement of the lever and a Waste of muscular power.

My present invention has for its object to provide a simple and efficient means for overcoming this diiiiculty; and it comprises the combination, with a ratchet-drill lever, of a bail-handle adjustable thereon in such a manner that the palm of the hand holding the said handle may be kept While operating the same in a plane parallel with the drill; also, the construction and combination of parts Whereby the leverage may be varied at Will Without incurring any inconvenience to the hand and movement by contact with the projecting or free end of the lever.

In the accompanying drawings, Figure l rep resents a side elevation of aratchet-drill having its handle constructed according to my present improvement, the shank of the handle being partly broken out, showing it swiveled upon the end oi the lever, the axis of the handle proper being situated in, but at right angles to, the extended axial line ofthe lever. Fig. 2 shows the handle movable upon the lever, for the purpose of va-rying the leverage, and provided with means for securing it in position. Fig. 3 represents a top view of a modication in which the shank or hub of the handle is arranged to slide and turn upon the lever, as aforesaid, for varying the leverage, the axis of the handle proper being outside of or lateral to the axis of the lever, though at right angles to the same, as above. Fig. Li is a section on the line fr :c of Fig. 3, as seen in the direction of arrow l. Fig. 5 is a similar view of a modification of the handle. Figs. 6 and 7 are views illustrating the positions of the hand during the operation of the drill according to my present improvement and to the old construction, respectively.

Like'letters of reference indicate like parts in the several iigures.

It will be observed, with reference to Fig. 6 and the arrov-r marked thereon, that it is in; tended to use a lefthanded drill, While' the right hand, as usual, is pulling at the handle. This is an improvement in the application of the power, which also facilitates making longer strokes than can conveniently be done under the old system exhibited in Fig. 7, (although, of course, I lay no claim to the use of a left handed drill.)

A is the drill proper, B the chuck or socketed head in which the ,drill is held, C the feed-screw, D the ratchet-Wheel, and E the paWl-lever by which the ratchet is turned. F is my improved bail shaped handle, being formed of a bored shanlnf, fitted upon the lever E, and having at its outer end a fork or curved projections, g, between which the handle proper, f', is pivoted. The shank is preferably free to turn upon the lever, so that the handle f will readilyT adapt itself to any convenient position at right angles, or nearly so, to the operators arm, but in order to vary the le verage the shank is also made to slide upon the lever E, and to be placed and held in position at different distances from the drill. This may be done, as shown in Fig. 2, byhaving grooves e made in the lever, and a spring, a., attached to the shank f and provided at its outer end with a pin, b, entering one of the said grooves e; but in the construction shown in Fig. 2 the lever can only be moderately shortened, for if the shank F were slid farther toward the drill the free end of the lever would strike againstthehandle proper,f, and inconvenience the hold of the same; For this reason I have provided the far more preferable construction shown in Figs. 3, 4, and 5, in which the prongs or bails g project from the side of the hub j' at about'right angles to the direction of its bore and to the axis of the lever E, thus giving perfect freedom to the hold of the handlef, While allowing vof varying the leverage Within the range of the lever E.

To allour the shank F freedom to turn upon IOO .2 y assess l the lever E while retained thereon at any desired distance from the drill, I have provided a jaw, G, constructed, as shown in Figs. 3 and 4, of connected hubs or lugs c, having an opening between them suitable to receive the shank j', the said lugs or hubs c sliding upon the lever E, and one of them being provided l with a set-screw, d, for securing it in position upon the said lever. A cheaper'oonstruetion is shown in Fig. 5, where one of the prongs g is omitted, the shankf, the remaining projections g, and the handle proper, f', being cast together in one piece and fastened by the setscrew d, threaded through the side of the shank ff The latter construction dispenses with the jaw G and allows of adjusting the leverage, but not of turning` the shank upon the lever when adjusted.

I am aware that the feature of making the operating-lever of a ratchet-drill extensible, so as to vary the leverage, is not new, and I lay no claim to the said feature.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. In combination with a ratehetdrill lever, E, ful'crumed upon the axis of the drill, a handle, F, arranged upon the said lever in a plane at or about right angles to the plane in which the lever moves and parallel with the drill, substantially asand for the purpose set forth.

2. I-n combination with a ratchet-drill lever, E, fulcrumed upon the axis of the drill, a handie, F, arranged upon the said lever in aplane at or about right angles to the levers plane of motion, the said handle being also arranged to slide upon the said lever, and -provided with means for securing it in position at different distances from the drill, to adjust the leverage, substantially as and for the purpose set forth.

3. The combination, with a ratchet-drill lever, E, fulcrumed upon the axis of the drill, of abored shank, f, provided with a handle, f, at or about right angles to the bore of the said shank, and of means for retaining the said shank upon the said lever, substantially as and for the purpose set forth.

4. The combination, with a ratchet-drill lever, E, fulcrumed upon the axis of the drill, and with the bored shank f, having the hann dlef at or about right angles to the said lever and bore, of the retaining sliding jaw G, provided with a fastening device, d, for fixing it in position upon the said lever E, substantially as and for the purpose set forth.

` 5. In combination with the ratchet-drill lever E, the bail-handle F, arranged with its hub f free to turn upon the said lever while operating the drill, and means, substantially as described, to prevent the said handle from sliding lengthwise on the lever E while working, for thepurpose set forth.

In testimony that I claim the foregoing `as my invention I have signed my name, in presence of two witnesses, this th day of January, 1883. A u

ALBERT SODERSTROM.

Witnesses:

AUG. YURCEN, NERE A. ELFWING. 

